Hi Andrew
AdWords API uses a
Token Bucket algorithm to meter the requests and determine the queries per second (QPS) rate. This is intended to prevent malicious or out-of-control software from overwhelming the AdWords API servers and affecting other users. The rate limits can fluctuate based on different variables, including server load. Hence, we don't recommend a fixed Queries Per Second (QPS) limit. It's extremely important to understand how to handle RateExceededError, and develop your software with rate limits in mind. Our recommendation is to check the
throttling mechanisms suggested in the guide to control and handle the rate limit errors.
It is possible to keep a track of the operational limits (with DEVELOPER scope). You will be able to calculate the API operations using the guidelines provided
here. The rate limit with ACCOUNT scope, can only be handled by slowing down.